Chain-welding apparatus.



- No. 768,219. I PATENTED. AUG. 23, 1904.

, J. w. GARLAND.

CHAIN WELDING APPARATUS. 01110111011 rmm NOV. 4, 1901. I no 11011111.; asuns-mum 1.

. 9 py lt a fflf 1 ms rrow/ ra No. 768,219. PATENTED AUG. 23, 1904. J.W. GARLAND. CHAIN WELDING APPARATUS.

APPLICATION FILED NOV. 4, 1901.

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N6. 768,219. PATENTED AUG.23*,1904.

\ J. w. GARLAND.'

I CHAIN WELDING APPARATUS;

' APPLICATION FILED 11017.4, 1901. no MODEL. 5 SHEETS-SHEET s.

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CHAIN WELDING APPARATUS. I

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W/TA/ESSES A m VEN'TOR No. 768,219 I PATENTBD AUG. 23, 1904. A

J. W. GARLAND. A CHAIN WELDING APPARATUS.

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PATENT OFFICE.

' CHAIN-WELDING APPARATUS- SPECIFIGATION forming part of Letters PatentNo. 768,219, dated August 23, 1904. Application filedNovember 4,1901.Serial No. 81,016- (No model.)

To a l] whom, it may concern.-

' Be it known that I, JOHN W. GARLAND, of Pittsburg, Allegheny county,Pennsylvania, have invented a new and useful Chain-Welding Apparatus, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 is a front elevation of a machineconstructed in accordance with my invention. Fig. '2 is a side elevationof the same. "Fig. 3 is a partial plan view showing the diesin retractedposition. Figs. 4, 5, and 6 are detail views of the top die, the bottomdie, and the back die used in end welding. Figs. 7, 8, and 9 are similarviews showing the top, bottom, and back dies, respectively, for sidewelding. Fig. 10 is a detail sectional view of a modified form of theupper die-block, and Fig. 11 is a detail view showing amodified form ofthe side die and its actuating connection.

My invention relates to machinery for \veld' ing scarfed chain-links andis designed to do away with the hand methods heretofore used and providea machine which will carry out the operation rapidly and successfullyand without the production of fins.

To that end it consists in a top and bottom die, at least one of whichis movable toward and from the other, one of these dies having aprojecting nose, in connection with side dies which are forced in towardthe supportingdie. Y

It also consists in the above combination, together with a movable backdie which prevents finning, and, further,in certain constructions andarrangements of the parts hereinafter described and claimed.

In the drawings, 2 represents the table of a welding-press supportedupon suitable legs 3. Upon the central forward portion of the table issecured a bottom die 4, which is preferably of the form shown in eitherFig. 5 or Fig. 8. WVhen used for end welding, the die is provided withan upwardly-projecting nose 5, which is preferably inclined rearwardly.the die having a curved groove 6 around the base of the nose. The die ofFig. 8, which is used 1 for side welding, issubstantially the same asthat of Fig. 5, except as to dimensions, and,

further, that the nose contains a front groove 7, arranged to receivethe link which is threaded through the link being welded.

The side dies 8 8 are preferably plain blocks having either flat hollowgrooved or curved faces and secured to slides 9, having link connections10 with. levers 11, carrying rollers 11, acted upon by cams 12 upon themain shaft 13 of the machine. A reciprocating movement is thus giveneach side die, the dies being moved inwardly toward the bottom die toclamp and size the link is moved downwardly.

The upper die 14 is provided with a recess 15 and a' groove 16,surrounding the same, the die for end welding of Fig. 4 being similar tothat for side welding of Fig. 7 except as to the dimensions of theblock, the shape of the groove and recess, &c. This top die is securedin the ordinary manner to'a dieblock 17, guided between the uprights 18and driven from crank 19 in shaft 13. It will be notedthat the top diemoves downwardly at an angle to the vertical, as shown in Fig. 2, and Ihave found this movement to be of special advantage in properly clampingand welding the parts, though the die may be grooved in a verticalplane, if desired. The side dies may also bemoved in and out at an glesto the horizontal plane.

The back die 20 is in the form of a plain block having a curved recess21 in the front curved face of the block. recess are curved to fiteither the end of the link, as shown in Fig. 6, or to fit the side ofthe link, as shown in Fig. 9. The back die may be reciprocated by anysuitable connections, and 1' have shown it as connected by link 22 andcrank 23 to a rock-shaft 24, carrying a segmental gear 25, engaging areciprocating rack 26, driven from cam 27 on the main shaft.

In the operation of the machine the link to be welded is placed upon thebottom die with the next link threaded" through it. The machine beingstarted into operation through a clutch 28 or other suitable clutch,operated by link 29 and foot-lever-BO, theside dies are forced inwardlyand engage the sides or ends of the link, according to the particular,dies before the top die- This front face andused. The upper die is thenforced downwardly, thus welding the lapped or scarfed rear parts of thelink, and the back die is then forced forwardly to prevent any inning atthe weld. The removable dies then being retracted another unwelded linkis slipped the link, though this may or may not be used,

as desired.

Instead of moving the side dies by means of slides I may give these diesa compound motion. Thus in Fig. 11 I show a side die 8, which ispivotally mounted at 35. The upper part of this die is connected bypivotal link 36 with lever 37, suitably actuated upon a moving part. Theadvantage of this movement of the side die is that it aids in forcingdown the bent-up side portion of the link and brings both the sideportions properly into the grooves in the lower die. 1 show in dottedlines the side bars of the link, the upper circle indicating theposition of the one side bar before it is forced down into the groove bythe die 8. This swinging or compound motion side die may be used on oneor both sides, though it is only needed upon one side.

The advantages of my invention flow from the use of the top and bottomdies in connection with the side dies, these dies automatically andquicklycarrying out the welding operation, and, further, from the use ofthe back die, which acts to prevent iinning.

The upper and lower dies may be reversed and many other variations maybe made in the form and arrangement of the parts in the direction ofmovement of the dies and in the shape of the dies without departing frommy invention. The cams may be made adjustable, so that they can bechanged to suit the different sizes or shapes and lengths.

The speed of the machine may be changed by suitable gearing to changethe speed ac- 1 cording to the size of the links, and one blow or anumber of blows may be used, as may be desired.

.I claim 1. 111 machines for welding chain-links, a pair of dies, atleast one of which is movable toward and from the other, one of saiddies having a projecting nose arranged to enter the link, side dies,mechanism for moving the side dies inwardly to clamp the sides of thelink, and mechanism for closing the top and bottom dies after the linkis clamped; substantially as described.

2. In machines for welding scarfed links, a pair of dies, at least oneof which is movable toward and from the other, one of said dies having aprojecting nose arranged to enter the link, movable side dies, a movableback die, mechanism for moving in the side dies to clamp the link, andmechanism for thereafter successively closing the pair of dies and thenmoving the back die forwardly; substantially as described.

3. In machines for welding scarfed links, a top and bottom die, at leastone of which is movable toward and from the other, said dies beingshaped to lit a chain-link, a side die, and mechanism arranged to givecompound motion to the side die to force down and clamp theupwardly-projecting leg of the link; substantially as described.

4. In machines for welding searfed links, a pair of dies, at least oneof which is movable toward and from the other, one of said dies having aprojecting nose arranged to enter the link, movable side dies, a movableback die, mechanism for moving in the side dies to clamp the link, andmechanism for thereafter moving in the pair of dies and the back die;substantially as described.

5. In machines for welding searfed links, a top and bottom die having aninterlitting nose and recess therefor,and provided with grooved portionsarranged to coact upon the joint, and movable side dies arranged to beforced against the link; substantially as described.

In testimony whereof l have hereunto set my hand.

' JOHN W. GARLAND.

\Vitnesses:

FRANK Pn'rson, ALFRED SANG.

